Boring attachment for drills.



PATENTED MAR. 10, 1908.

O. OSBORNE. v BORING ATTACHMENT FOR DRILLS.

APPLICATION FILED JUNE 27,1907.

.nl um HMMMMMMHMMMH HM MMMMMMH INVENTOR: 0250 0650/??(9 W/ TNE SSE 8 Q/WW J Arrom vers' UNITED srs OTTO OSBORNE, OF ZANESVILLE, OHIO, ASSIGNOR OF ONE-HALF TO ZANESVILLE, OHIO.

LANCE B. SLOCOMB, OF

BORING Arrncrnunnr FOR DRILLS;

To all whom it may concern: I

Be it known that I, O'r'ro OsBoRNE, a citizen of the United States, and a resident of Zanesville, in the county of Muskingum and State of Ohio, have invented a new andvlm proved Boring Attachment for Drills, of which the following is a full, clear, and exact description.

This invention relates to machine tools, and concerns itself especially with the construction of a boring attachment to be used with drill presses. I I

The invention consists in the construction and combination of forth in the claims.

Reference is to be had to the accompanying drawings forming a part of this specification, in whlch similar characters of reference indicate corresponding parts in all the figures. V

Figure 1 is a side elevation of the lower portion of a drill press to which the invention has been applied, a portion of the arm being represented as broken away; Fig. 2 is a plan of a portion of thearm and illustrating its construction when'the device is applied as a boring attachment for a drill; a portion of this View is broken away; Fig. 3 is a cross section through the socket at the end of the drill spindle and illustrating the manner of attaching the boring device thereto; and Fig. 4 is a vertical section through the work tablejof the drill press shown in Fig. 1 and illustratin the manner of insuring that the borin too ,will be properly centered. Re erring especially to the parts, 25 repr'esents the drill ress having a post 26 mounted on a suita e base 27. At the upper portion of the post a spindle arm 28- ro'ects horizontally, and in this arm the s indf of the drill is adapted to rotate an slide in the usual manner.

Near the foot of the post 26 a table arm 30 projects horizontally and supports a drill table 31-, the center of which is in alinement with the spindle 29; In applying my invention, I attach in the socket 32 at the lower end of the drill spindle, a hub 33. This hub is provided with em ered shank 34 similar 'to that found in dri s. This shank is re-I Specification of Letters Patent.

of the feed screw a feed whee parts to be more fully. described hereinafter and particularly set arm as indicated.

.the workbein spindle 29.

Patented March 10, 1908.

under side of this hub an arm. 36 is rigidly attached. In attaching the hub to the arm, I provide the upper face of the arm with a countersink or recess 37 in which the flange 38 v I of the hub isreceived, and attached by means of screws received in the openings 39. -The arm 36 is formed into a guideway'having a sliding block, and this block carries a nut 41 mounted on a longitudinally disposed feed screw 42 which is carried in the arm and which projects from the outer end thereof as shown in Fig. 2. Upon the rojecting end For star wheel 43 is attached. At each revolution of the arm. this.feed wheel is ada ted to engage with a tri Iping stem 44 whicli is attached in any suital i e manrierto the post 26 as shown. The sliding block 40 carries a .tool post 45 carryingia tool 46. I provide means for insuring't received an arbor 49, the upper end of wh is rigidly attachedto the under side of the In the operation of this tool, thework is fastened to the face of' the at the arm 36 will rotate truly. For this purpose, inthe central opening 47 which is always found in drill tables, .I mount a 4 bushing 48. In this bushing there is looselydrill table in-the usual manner, the center of I centered with respect to the s the arm rotates with the Spindle, at each revolution the star wheel 43 engages the trip stem'44 and gives the tool post 45 an outward feeding movement.

Attention is called'to the fact that the spindle 29 can be raised or lowered in the usual manner, these movements being. permitted by the slidin connection of the arbor 49 through the busiin greatly increases the rigidity and strengthof the mounting for the arm, as will be readily understood.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

g 48. The arbor '49 1. A drill press having a s indle with a socket in the lower end thereo and a table with an opening in alinement with said spindle, in

com ination with ,an arm" having a hub se- ..'cured in said socket, a tool guided in said loo arm, an arbor rigid-with said arm and rotatv ing in said opening, and means for automatically feeding said tool outwardly in said arm.

'2. A boring attachment for a drill press, name to this specification in he presence of comprising an arm adapted to be attached to two subscribing witnesses. the drill spindle, a tool carried by said arm, UN 0 (hm \1 F feeding mechanism for said tool, and an arbor 5 attached to'said arm and ada ted to center Witnesses:

the same upon a support there elow. H. E. BUKER,

In testimony whereof I have signed my L. B. SLOCOMB. 

